;;; guix-read.el --- Minibuffer readers ;; Copyright © 2015 Alex Kost ;; This file is part of GNU Guix. ;; GNU Guix is free software; you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published by ;; the Free Software Foundation, either version 3 of the License, or ;; (at your option) any later version. ;; GNU Guix is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; You should have received a copy of the GNU General Public License ;; along with this program. If not, see . ;;; Commentary: ;; This file provides functions to prompt a user for packages, system ;; types, hash formats and other guix related stuff. ;;; Code: (require 'guix-help-vars) (require 'guix-utils) (require 'guix-base) (defun guix-read-file-name (prompt &optional dir default-filename mustmatch initial predicate) "Read file name. This function is similar to `read-file-name' except it also expands the file name." (expand-file-name (read-file-name prompt dir default-filename mustmatch initial predicate))) (defmacro guix-define-reader (name read-fun completions prompt) "Define NAME function to read from minibuffer. READ-FUN may be `completing-read', `completing-read-multiple' or another function with the same arguments." `(defun ,name (&optional prompt initial-contents) (,read-fun ,(if prompt `(or prompt ,prompt) 'prompt) ,completions nil nil initial-contents))) (defmacro guix-define-readers (&rest args) "Define reader functions. ARGS should have a form [KEYWORD VALUE] ... The following keywords are available: - `completions-var' - variable used to get completions. - `completions-getter' - function used to get completions. - `single-reader', `single-prompt' - name of a function to read a single value, and a prompt for it. - `multiple-reader', `multiple-prompt' - name of a function to read multiple values, and a prompt for it. - `multiple-separator' - if specified, another `-string' function returning a string of multiple values separated the specified separator will be defined." (let (completions-var completions-getter single-reader single-prompt multiple-reader multiple-prompt multiple-separator) ;; Process the keyword args. (while (keywordp (car args)) (pcase (pop args) (`:completions-var (setq completions-var (pop args))) (`:completions-getter (setq completions-getter (pop args))) (`:single-reader (setq single-reader (pop args))) (`:single-prompt (setq single-prompt (pop args))) (`:multiple-reader (setq multiple-reader (pop args))) (`:multiple-prompt (setq multiple-prompt (pop args))) (`:multiple-separator (setq multiple-separator (pop args))) (_ (pop args)))) (let ((completions (cond ((and completions-var completions-getter) `(or ,completions-var (setq ,completions-var (funcall ',completions-getter)))) (completions-var completions-var) (completions-getter `(funcall ',completions-getter))))) `(progn ,(when (and completions-var (not (boundp completions-var))) `(defvar ,completions-var nil)) ,(when single-reader `(guix-define-reader ,single-reader completing-read ,completions ,single-prompt)) ,(when multiple-reader `(guix-define-reader ,multiple-reader completing-read-multiple ,completions ,multiple-prompt)) ,(when (and multiple-reader multiple-separator) (let ((name (intern (concat (symbol-name multiple-reader) "-string")))) `(defun ,name (&optional prompt initial-contents) (guix-concat-strings (,multiple-reader prompt initial-contents) ,multiple-separator)))))))) (guix-define-readers :completions-var guix-help-system-types :single-reader guix-read-system-type :single-prompt "System type: ") (guix-define-readers :completions-var guix-help-source-types :single-reader guix-read-source-type :single-prompt "Source type: ") (guix-define-readers :completions-var guix-help-hash-formats :single-reader guix-read-hash-format :single-prompt "Hash format: ") (guix-define-readers :completions-var guix-help-refresh-subsets :single-reader guix-read-refresh-subset :single-prompt "Refresh subset: ") (guix-define-readers :completions-var guix-help-key-policies :single-reader guix-read-key-policy :single-prompt "Key policy: ") (guix-define-readers :completions-var guix-help-elpa-archives :single-reader guix-read-elpa-archive :single-prompt "ELPA archive: ") (guix-define-readers :completions-var guix-help-verify-options :multiple-reader guix-read-verify-options :multiple-prompt "Verify option,s: " :multiple-separator ",") (guix-define-readers :completions-getter guix-graph-type-names :single-reader guix-read-graph-type :single-prompt "Graph node type: ") (guix-define-readers :completions-getter guix-lint-checker-names :multiple-reader guix-read-lint-checker-names :multiple-prompt "Linter,s: " :multiple-separator ",") (guix-define-readers :completions-getter guix-package-names :single-reader guix-read-package-name :single-prompt "Package: " :multiple-reader guix-read-package-names :multiple-prompt "Package,s: " :multiple-separator " ") (provide 'guix-read) ;;; guix-read.el ends here ve unneeded conditionals for (guix build syscalls)....Manolis Ragkousis 2016-03-19build: Protect against misconfiguration of localstatedir....Ludovic Courtès 2016-01-13build: Use 127 as the Linux hash-bang limit....Ludovic Courtès 2016-01-12build: 'make check' errors out if file name limits would be hit....Ludovic Courtès 2016-01-12build: Warn against long hash bang lines for tests....Ludovic Courtès